Pump



July 5, 1927.

PUMP l Fi-led July 25. 1923 2 SheetseSheet 1 Z m am www .\L Nw KLA //1EL/ E \1N u N Nw N J Q M1 lmb n@ v NQ atta/nuto kao CTI

THOMAS C. WHITEHEAD,

yPATENT OFFICE.

k0F DETROIT, MICHIGAN.

PUMP.

Application filed July 23,

AThe inventio-n relates to pumps, being more particularly designed for use as a gas compressorand the invention consists in the construction as hereinafter set forth.

In the drawings:

Figure 1 is a cross-section through the pump takenon the line 1 1 of Figure 3;

Figure 2 is afbottom plan View of the head looking from below upward;

'Figure 3 is a section taken on ,3 3 of Figure l;

Figures 4c and 5 valve plates. Y I

One of the objects of the invention is to obtain a construction in which the seating and unseating of the valves is substantially noiseless, and a further object is to obtain va simple construction of valve. This I have accomplished by formingV the valves of resilient normally flat wafer-like strips covering the ports and which, under pressure, are slightly bowed to provide clearance between the same and the seat. The ports for the the line are plan views of the valves are preferably formed in one or more.V

plates interposed between the cylinders and the head and clearance for the bowing of the valves is provided bysegmental recesses in the member above the seat. Y

In detail, A is the cylinder block and B a detachable head therefor, which is preferably provided with inlet Vandy outlet pasl` sages controlled or variably restricted by the shut-olf Valves C and D. As shown these valves have conical heads C and D engageable with suitable seats C and D and have upstanding stems C2 and D2 threadedly engaging bushings C andD3 carried by the head B. These inlet and outlet passages communicate with longitudinally extending chambers E and F which are arranged upon opposite sides of the common central plane of the cylinders and extend the length of the series. Between the head Band cylinder block'A are arranged one or more plates G,

which form seats for the valves. Preferably YI employ two of vsuch plates, which are duplicates but oppositely arranged. .Thus as shown in Figures 3 and 4:, the plate G has a series of segmental recesses H formed'on its lower side upon oneside of the common centralrplane of the cylinders, and, as shown in Figure 5, the plate G has a series of segmental recesses H in its upper face o-n the opposite side of the common central plane of the cylinders.v The plate G is further provided with pairs of ports I, I passing 1923. Serial No. 653,232.

through the plate in registration with each of the recesses Hand with ports .I on the opposite sldeof the central plane, which reg- .ister centrally with the recesses I-IY ofthe lower plate G. A The plate Gis provided with corresponding ports I, I and J. v K are strips of thin metal which are arranged in the recesses H and I-I, preferably eXtend- Aing beyond the segmentall portions into eX- tensions of said recesses.y This permits each of the strips K to lie flush with the vface of the adjacent plate, the strips in the recesses pressure is exerted against a strip towards` the platehaving the registeringY port J, said strip will seal the port or close the-valve. On the other hand, `any gaseous pressure Vexerted through the port against the registering strip will bow such strip into the seg- Vmental recess, providing clearance therefor,

which will open the passage. In this manner the suction stroke of each piston will draw in gas from the passageE and through the ports I, I past the valve Kand through the port J into the cylinder. During this .stroke the outlet passage F is out of communication with the cylinders by the seating of the valves K. Upon the reverse stroke the outlet valves will open and the inlet valves will be seated, but this movement is accomplished without noise', inasmuch as some por,- tion of each .strip K is always in contact with the adjacent plates G or G.

That I claim as my invention is l. In a pump, the combination with a block having a plurality of lcylinders therein, of a head, a pair of duplicate reversely arranged plates clamped between said head and block, each plate having a series of siegmental recesses opposite each cylinder and on one side of the common central plane of said cylinders,-and a series'of portsregistering with said cylinderson'the opposite sid-e of said common Vcentral plane, the ports of one plate also registering with the recesses oit the other plate, and strips ol" resilient inaterial within said recesses nfninally lying [latl to seat: about the port in the ailjaeentplate hut capable et bowing away :troni said seat into said segmental recess upon reversal ol: pressure.

2.1411 a puinp, the combination with a pluralityv of cylinders and a eonnnon heatl tor said cylinders. saitl heatl having an inlet anti an outlet passage, ot a pair ol valves :zssoeiateil with each cylinder, controlling the inllow anal outtlow there troni and each aiittnuaticalliY responsive to pressure Varie.- tions in the ooi-responding eylinler, anti a pair oit shut-oil' valves niountetl in said heatl anti eontrolliiig seid inlet and outlet pas- 23. ln a puinp, the combination with a i'ilurality ol cylinders and a coininon heacl `tor said cylinders, oit a pair ol' ported plates clamped between saicl heatl antl Cylinders, one ot said plates haring intake ports lor the respective cylinders and the other plate having corresponding outlet ports, each of saitl plates heilig tornieil with recesses in tace adjoining the other plate, respeetively in con'nnunieation with the ports ot the other plate, ancl lealil Spring 'valves within saitl controlling Saint ports and uutoinaticall7 responsive to pressure Variations within the eylinclers ctnrespoinling `to said ports, said head having passages open` .ing in its 'tace atljoiningsaiil plates, connecting saitl intake ports and connecting said outlet ports.

-l-. In a pump, the combination with a c vlilnler, and a head therefor, ot coniplenientzuiv plates between saitl cylinder and head havingl openings therein, the opposed Alaces oit said plates having segmental recesses in coin reseau and recesses in one plate heilig otlset with vi".

respect to the recesses and openings in the other plate whereby the opposed laees oit saifl plates will serve as ahutnients :tor said Valves.

ln a pump, the combination with a oylintlei, aint a head therefor having spaeetl inlet and outlet gas passages, of plates hetween saitl cylinder and head having openings therein, the opposed faces of said plates haring neg-mental recesses crossing said 55 openings, and waiter valves in the recesses in the respective plates controlling the flow ot gases through said openings, 'the open rip in one plate Communicating with the inlet passage 1n the heatl, antl the openings in the other plate eoinniunioating with the outlet` passage 1n the head, said plates being separable `lor the replaeeinent and repair of saitl valves.

(S. ln a pump, the combination with acyl.- intfler, ant] a head therefor having spaeetl inlet and outlet gas passages, et interehangeahle plates between. saitl heacl and cylinder haring gas openings therein, the opposed lll ee" ot' saitl plat-es having segmental re c es Crossing said openings, and water valves in the recesses in the respective plates` Al'or Controlling the flow ot gases through saic'l openings, the arrangement: ol openings and recesses in said plates being such with i'e-1pect to the passages in saitl heaifl that the valves in one plate will remain seated 'while the valves in the other plate are unseatecl.

In testin'iony whereof l affix my sigiiature.

THOMAS VHITEHEAD. 

